The 26th International Display Workshops (IDW '19)

講演情報

Oral Presentation

[OLED3] OLED Display

2019年11月27日(水) 17:00 〜 18:25 Room 204 (2F)

Chair: Taishi Tsuji (NIPPON STEEL Chemical & Material)
Co-Chair: Masaya Adachi (Japan Display Inc)

18:10 〜 18:25

[OLED3-6L] Significance of Energy-Level Alignment in 3D Perovskite ELs Significance of Energy-Level Alignment in 3D Perovskite ELs

*KIHYUNG SIM1, HAYATO KAMIOKA2, JUNGHWAN KIM1, HIDEO HOSONO1 (1. Materials Research Center for Element Strategy, Tokyo Institute of Technology, (Japan), 2. Department of Physics, College of Humanities and Sciences, Nihon University (Japan))

キーワード:Metal Halide Perovskite, Perovskite light-emitting diode (PeLED), Electron Transport layer (ETL), Exciton Confinement Effect, Charge Balance

In this study, we report a significant phenomenon that EL performances for 3D materials, such as CsPbX3, are governed by adjacent charge transport layers, which is possibly due to nonradiative recombination resulting from the small exciton binding energy. To overcome this issue, we developed a new electron transport layer (ETL) that enhances exciton confinement effect in 3D CsPbX3. Consequently, we achieved ultra-high brightness of 500,000 cd/m2 at a very small operating voltage of 5V.